Device for varying the amount of recoil in firearms



Feb. 27, 1 940.. s H S 2,191,484

DEVICE FOR VARYING THE AMOUNT OF RECOIL IN FIREARMS Filed March 22, 1937Patented Feb. a, tan

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DEVICE FOR-VYING THE AMOUNQ F RECOHL EN FIREARMS Robcrtfi. S. Hughes,Baltimore, Md, assighor of one-half to Milton Roberts, Baltimore, Md.

Application March 22, 1937, Serial No. 132,397

4 Claims. (oi. 89-44) This invention relates to a device for controllingthe recoil of guns adapted to fire projectiles so that a high percentageof recoil may be eliminated and the percentage of recoil elimination maybe lessened as desired to the'point of practically no recoilelimination. It may be desirable to have a relatively high recoilelimination for some types of guns, whereas with other types the recoilelimination should be small, and the device Lo of my invention providesfor controlling the percentage of recoil elimination as well as meansfor regulating the amount of blast resulting from the discharge of thegun. A

In the accompanying draw ng: l5 Fig-1-is a longitudinal central sectionthrough my device showing it attached to the muzzle end of a gun barrel,a portion of the barrel being also shown in central longitudinalsection;

Fig. 2 is a transverse section through the device, 20 taken on the line2--2 of Fig. 1 and Fig. 3 is a transverse section on the line 33 of Fig.1.

In the drawing 5 indicates the muzzle end of a gun barrel, 2indicates'the bore of the barrel and 25 A indicates the recoilcontrolling device as a whole. The body 6 of the device is formed with acylindrical gas chamber? and with a collar 5 at one end which forms aninlet to the chamber and a means for attaching the device to the gun 30barrel. The barrel is externally threaded as shown at 3, and thecollanhas internal threads 3 which engage the threads on the barrel. Aseal port it extends from the forward end of the gas chamber through acylindrical part 9 at the for- 35 ward end of the body, the seal portbeing in axial alinement with the collar and also with the bore of the"barrel when the device is mounted on the barrel. An annular shoulder 6extends from the inner end of-the seal port to the side wall of the 4chamber, and a plurality of discharge ports 8, in

an arcuate series, extend rearwardly'and outwardly from the forward partof the chamber adjacent said shoulder. A plurality of bafiie ports 1 l,in a similar series, extend through the side 5 wall of the chamber, atthe rear of the discharge 1 ports, in a plane substantiallyperpendicular to the am's of the inlet opening and seal port, wherebythegases passing from the baflle ports will intercept the gases passingfrom the discharge 50 ports. It is to be noted that in the drawing thedischarge ports are arranged around the .top and sides of the body andthat there are no ports in its lower part, and that the baflle ports are'similarly arranged. When the device is vmounted 55 upon a gun barrel itis held in this position by a and no blast.

set screw 25 which extends through the collar 5. The omission of portson the lower side of the device is to lessen thedownward blast, which isdesirable when the gunner is shooting prone.

A sleeve l2 for controlling the ports is slidably 5 mounted on the body.As shown, this sleeve has an internal annular flange l3 which isslidable on the collar and the forward part of the sleeve is I slidableupon the part of the body in advance of thecollar. This forward part ofthe sleeve has M an outwardly extending flange, M and the forward faceof the sleeve and flange slopes forwardly and outwardly from thebodyas'shown at E5. The sleeve is adjustable forwardly and backwardly on thebody by means of an adjusting rod I8 having a threaded portion ll whichextends through a threaded opening in 2. lug l6 depending from thesleeve and having its end portion I 9 journalled in an opening in a lugdepending irom the body 6. A collar 2i, secured to the part i9 bya pin22, 20 prevents endwise movement of the adjusting rod,

'A knob 23, secured'to the rear end of the rod by a pin 24, is providedforturning the rod to adjust the sleeve. v

Recoil elimination results from the discharge of the products ofcombustion through the discharge ports 8, and the'resulting reactionagainst the shoulder 6 If the sleeve is adjusted to its rearmostposition, leaving the bafile ports and discharge ports open andunobstructed, the result, when the gun is fired, will be a maximum ofrecoil elimination and a substantial reduction in blast againstthe-gunner. If the sleeve is moved forward to the position shown in thedrawing, where the discharge from the bafile portsv will be directedforwardly by the inclined lip on the sleeve? this will lessen the recoilelimination to a certain extent and also lessen theblast against thegunner. If the-sleeve is moved to-the.position where the bafile portsare entirely closed and the discharge ports are left entirely open,recoil elimination will be further reduced and also blast against thegunner. If the sleeve is adjusted to its foremost position, closing thedischarge ports, the bailie ports being closed, 2.5

there will be practically no recoil elimination barrel and a sealport atits .forward end in axial alinement with said inlet opening and ashoulder extending laterally from the inner end of the seal port to theside wall of the chamber, said device having a plurality of dischargeports extending rearwardly and outwardly from the forward part of thechamber, adjacent the shoulder therein, and having a series of baflieports extending through its side wall in a plane substantiallyperpendicular to the axes of the inlet opening and seal port whereby thegases passing from the bafile ports intercept the gases passing fromsaid discharge ports.

2. A recoil controlling device for guns adapted to fire projectiles,comprising a'body adapted for application to the muzzle end of a gunbarrel,

' said body having a cylindrical gas chamber theretially perpendicularto the axes of the inlet opening and seal port whereby the gases passingfrom the bafile ports intercept the gases passing from said dischargeports, and a member adjustable on the body to close and open the baflleports.

3. A recoil controlling device forrguns adapted Y to fire projectiles,comprising a body adapted for application to the muzzle end of a gunbarrel, said body having a cylindrical gas chamber therein and having acylindrical inlet opening at its rear end adapted to receive the muzzleend of a gun barrel and a seal port at its forward end in axialalinement with said inlet opening and a shoulder extending laterallyfrom the inner end of the seal port to the side wall of the chamber,said-device having a plurality of discharge ports extending rearwardlyand outwardly from the forward part of the chamber, adjacent theshoulder therein, and having a series of baflle ports extending throughits side wall in a plane substantially perpendicular to the axes of theinlet opening and seal port whereby the gases passing from the baiiieports intercept the gases passing from said discharge ports, and asleeve adjustable longitudinally of the body to close andrear endadapted to receive the muzzle end of a gun barrel and a seal port at itsforward end in axial alinement with said inlet opening and a shoulderextending laterally from the inner end of the seal port to the side wallof the chamber, said device having a plurality of discharge portsextending rearwardly and outwardly from the forward part of the chamber,adjacent the shoulder therein, and having a series of balfie portsextending through its side wall in a plane substantially perpendicularto the axes of the inlet opening and seal port whereby the gases passingfrom the baflle ports intercept the gases passing from said dischargeports, and a sleeve adjusta- -b1e longitudinally of the body to closeand open the bafile ports and discharge ports, said sleeve having itsforwardend flaring forwardly and outwardly from the body.

ROBERT H. S. HUGHES.

